Method of making resilient couplings



June29, 1943. M. GOLDSCHMIDT 2,323,215

. METHOD OF MAKING RESILIENT COUPLINGS Original Filed July 2, 1942 2 Sheets Sheet 1 Max GOMSChm; dt

June 29, 1943.

M. GOLDSCHMIjDT METHOD OF MAKING RES ILIENT COUPLING$ 2 Sheets-Sheet 2 Original Filed July 2, 1942.

Z w 2 7/47%// IV/ V Max GOIdSC/Lh'Hdt Patented Junev29, v v I i UNITED S ATES- ATENT. OFFICE Ma'r'non ogzigg g' ausmu'r v Max Goidschmidt, Leicester, England, assignor to Metalastik Limited, Leicester, England, a British company Original application July 2, '1942, Serial No. 449,380. Divided and this application January 13, 1943, Serial N 472,286. In Great Britain February 26, 1941 3 Claims; (Cl. 29-148) Rubber and metal units for use as vibration inthe pressing out o1v the arm made on straight sulators and resilient, mountings for instruments, lines. machines and the like are well known in which Figure 'l is a cross section illustrating two forms the metal parts form attachment means and load of construction, with perpendicular arms on the transmitting means and the rubber forms the 5 left of the figure and inclined arm on the right.

resilient connection and shock-taking element. Figures 8 and 9 are respectively plan and cross The metal parts are. arranged in spacial relation section of a unit with a square outline;

and the rubber is bonded to them by a vulcaniza- Figure 10 shows a blank for a three armed tion process giving a very strong union. arrangement.

This application is a division of applicant co- 10 Figure 11 is a sectional view of a unit'showing pending case Serial No. 449,380, filed July 2.19%. the arms of the members of angular section in It is an object of the invention to provide an a plane parallel with the axis.

' economical and eiiicient method of manuiactur- As one simple example of construction we may ing such rubber and metal units which facilitates. stamp .out a plate or. the size required tor the their production. 15 attachment part 01 the larger member, and pierce It is an object of the invention so to conthis blank by appropriate press tools to remove struct and arrange the respective metal parts 1 a maltese'cross-like flgure from the centre, leav that when they are in the flat they are compieing' the surrounding outer part oi the plate unmentary and both are stamped or pressed in mutilated except for the formation of holesi'or accordance with the improved method of manuattachment screws or bolts. Themaltese crossiacture from one metal sheet or plate, the'blank like .smaller member which is displaced from the v for one part being formed by the metal displate has a central, flat disc in which a square'or placed from the sheet or plate in iorminz the other hole for attachment purposes may be" other formed; I I It is a characteristic or the rubber and metal Projecting nwa d y f om the circ ar plate of units produced by this improved method that the the larger member are four equally spaced inattachment part of one metal part sh ll be eenwardly tapering arms, and radiating out from tral and the attachment part of the complethe flat disc oi the smaller member are four outmentary metal part sh b peripheraL wardly increasing arms. The arms or both parts By this mean both attachment part c be may be pressed out from the flat at suitable comannular and continuous metal member uch a v piementary inclinations or curves, or at right anrings, polygons or squares or oblon rectangular gles thereto and the smaller part will beassemflxures with arms projecting inwardly therefrom bled coaxially with the larger part and with its tor the one part, and circular discs, squares or arms facing opposite the arms oi the larger P 1 oblong rectangular figures with outwardly d1- in order that rubber pads or blocks may be bondrected arms for the other part. -'ihis m k ed to the facing surfaces of all the arms.

tmgelstructures 1 a thickness In Figure l. the metal plate is circular and a anew; any given maitese cross-shaped blank is stamped out of The ded drawings illustrate various com the central part leaving a ring like blank with ia of the invention 40 inwardly projecting arms. The ring like blank is me 1 is a plan or a pierced hm marked a and its inwardly projecting'and taper- Y ing arms b while the cruciform blank is marked 2 is a i warmer and 'c and its arms 07. The two blanks are coaxially mam mm made bled with the arms of the blank 0 turned me 3 is plan or an led unit in through an angle of 45 to bring them exactly which the arms are pressed out from the plane of opposite the arms b of the blank 0 In this post the two blanks made from the pierced blank tion rubber may be bonded directly to the opposshownin Figure-l and are slightlycurved circummg races of the i to form the t shown in ierentially. A Figure ,2 in which e represents the rubber, which re 4 is a cross section throughan mem may be in ring form or in four blocks contembled unit of the form shown in Figure 3 b wi h ing in shape with the arms b and d. ,Holes 1 in the arms complementarily curved from the sh ulthe member (1 enable this member of the unit to dertothe end. I be secured by bolts, screw or like mean to a Figures 5 and 6 are similar views to e surface, and a hole such as the square hole a 1 and 3 but showing the piercing oi the blank and will enable the member 0 to be secured and keyted against turning on another part such as a sh t. l

The arms b and it may be pressed out of the main plane of the, respective blanks as shown in Figures 3 and 4 and this isthe preferred arrangement. with the faces of the free ends of the arms d of the'small blank c cut to acurve as shown in 'Figure 1, the blanks may be pressed so that the arms b and d have circumferential curvature, i. e.

in a direction transvese to aline from root to tip. The arms at the i rots where they bend from the flat blanks will then be part of a circle seen in the face view, Figure 3.

The armsb and (1 may also be curved in the direction of the length of the arin from root to tip as more clearly shown'in the cross sectional view, Figure 4.

In Figures 5 and 6 the blanking out operation is carried out so as to. make a straight out at h where the ends of the arms d are formed and the arms I) are shown bent out'from the blank on a chord at 1' instead of the curve as in Figure 3. Otherwise this constr uction resembles the construction illustrated in Figures 3 and'4.

In these arrangements, Figures 3 to 6, the

inner smaller blank (2 is assembled with its flat disc-like part remote from the blank a and the ends of its arms adjacent the roots of the arms b; this rendersthe arms complementary to each other with the broad parts facing each other so that an. approximately. truncated triangular shaped rubber block e will conform in shape with a pair of opposed arms between which it is bonded. p

As shown in the lower part of the sectional view at Figure '7 the arms b and d maybe complementary inclines or as shown inf he left upper part of that figure they may be perpendicular -to the main plane of the respectivemetal parts a and 0.

Figures 8 and 9 show a square fblank a with arms b and d perpendicular to the blanks a and c.-

In Figure 10 a blank for a three armed unit is shown instead of thecruciform arrangement previously described but the construction otherwiseis the same. 1

The arms-need not be stamped so as to use the whole of the metal in the original plate from which'the two blanks a and c are formed. The

- overlapping arms may be of less width leaving scrap metal between them where the load to be resiliently taken by the rubber is not so large.

in compression, tension, torsion, or shear, or combinations thereof; and the particular bending or setting of the arms to the perpendicular position, inclines, curves, angle sections or the like may be chosen to give the best response of the rubber to its conditions of loading.

.The' arms need not be set out from the plates for some uses. v

It will be obvious that the number of arms of the mounting may be reduced or multiplied to suit particular designs or mounting.

The term rubber is used to cover suitable compounds of it with other substances. and synthetic rubber preparations where they are applicable.

I claim: l. The method of making a resilient coupling or mounting for resiliently connecting two relatively movable members which comprises providing a plate, striking out a central part of the plate to simultaneously form an inner part having a central attaching portion adapted to be connected to one member and arms projecting outwardly therefrom, and an outer part having an attaching rim'adapted to be connected to the other member and inwardly projecting arms .formed through striking out the first mentioned arms, turning the parts to dispose the arms of one part in aligned face to face relation to the arms of the other part, and connecting the arms of one part to the arms of the other by vulcanizing rubber to their adjacent faces.

2. The method of making aresilient coupling or mounting for resiliently connecting two relatively movable members which comprises providing a plate, striking out a central part of the p a plate to simultaneously form an innerpart having a central attaching portion adapted to be connected to one member and arms projecting outwardly therefrom and an outer part having an external attaching rim adapted to be connected to the other member and inwardly projecting arms formed through striking out the first mentioned arms, turning the partsto dispose the' arms of one part in aligned face to face relation to the arms of the other part, bending the arms of the inner. part inwardly and As will be seen from the form illustrated in I Figure 3 the inner metal member may have some movement in all directions, in the manner of a;

metal part. .The rubber blocks would then be 5.5 -so-called umversal'joint, relatively to the outer stressed in torsion, partly in shear, in compres-T sion and'in tension according to the angular 1 relative. movements of the inner and outer parts.

The-manufacture'of the mounting unit is economical as the scrap metal from one blanking operation-is utilised for the smaller metal part.

The complete rubber and metal unit thus formed may then be mounted'between a supportingsurface and an article or between two rotary members to be coupled, with the larger metal attachment part secured'to the one surface and the smaller disc-like part'securedto the. other with their arms connected together by thgrubber. The unit lends itself to use in almost any form of resilient mountings or coulings, whether designed for loading the rubber the arms of the outer part outwardly to place them in inner and outer spaced positions and.

connecting the arms of the inner part to the arms of the outer part by vulcanizing rubber to and between their adjacent faces.

-3. The method of making a resilient coupling or mounting for resiliently connecting two relatively movable members which'comprises providing a metal disc adapted to be connected at its outer margin to one member, striking out metal from the disc so as to simultaneously form a second part havinga central attaching portion adapted to be connected to the other member and circumferentially spaced arms projecting outwardly therefrom; with circumierentially op- 

